Handle parsing wildcard urls in launch profiles

src/Aspire.Hosting/ApplicationModel/EndpointAnnotation.cs

@@ -66,7 +66,8 @@ public EndpointAnnotation(ProtocolType protocol, string? uriScheme = null, strin
     /// <summary>
     /// Desired port for the service
     /// </summary>
-    public int? Port {
+    public int? Port
+    {
         // For proxy-less Endpoints the client port and target port should be the same.
         // Note that this is just a "sensible default"--the consumer of the EndpointAnnotation is free
         // to change Port and TargetPort after the annotation is created, but if the final values are inconsistent,
@@ -104,6 +105,11 @@ public int? TargetPort
     /// </summary>
     public string UriScheme { get; set; }
 
+    /// <summary>
+    /// This is the address the resource is listening on. By default it is localhost.
+    /// </summary>
+    public string TargetHost { get; set; } = "localhost";
+
     /// <summary>
     /// Transport that is being used (e.g. http, http2, http3 etc).
     /// </summary>

src/Aspire.Hosting/Dcp/ApplicationExecutor.cs

@@ -943,7 +943,7 @@ private void AddAllocatedEndpointInfo(IEnumerable<AppResource> resources)
 
                 sp.EndpointAnnotation.AllocatedEndpoint = new AllocatedEndpoint(
                     sp.EndpointAnnotation,
-                    sp.EndpointAnnotation.IsProxied ? svc.AllocatedAddress! : "localhost",
+                    "localhost",
                     (int)svc.AllocatedPort!,
                     containerHostAddress: appResource.ModelResource.IsContainer() ? containerHost : null,
                     targetPortExpression: $$$"""{{- portForServing "{{{svc.Metadata.Name}}}" -}}""");
@@ -977,6 +977,11 @@ private void PrepareServices()
                 var port = _options.Value.RandomizePorts && endpoint.IsProxied ? null : endpoint.Port;
                 svc.Spec.Port = port;
                 svc.Spec.Protocol = PortProtocol.FromProtocolType(endpoint.Protocol);
+                svc.Spec.Address = endpoint.TargetHost switch
+                {
+                    "*" or "+" => "0.0.0.0",
+                    _ => endpoint.TargetHost
+                };
                 svc.Spec.AddressAllocationMode = endpoint.IsProxied ? AddressAllocationModes.Localhost : AddressAllocationModes.Proxyless;
 
                 // So we can associate the service with the resource that produced it and the endpoint it represents.

src/Aspire.Hosting/ProjectResourceBuilderExtensions.cs

@@ -371,6 +371,8 @@ private static IResourceBuilder<ProjectResource> WithProjectDefaults(this IResou
                         e.Port = endpoint.BindingAddress.Port;
                     }
                     e.UriScheme = endpoint.BindingAddress.Scheme;
+                    e.TargetHost = endpoint.BindingAddress.Host;
+
                     adjustTransport(e, endpoint.Protocols);
                     // Keep track of the host separately since EndpointAnnotation doesn't have a host property
                     builder.Resource.KestrelEndpointAnnotationHosts[e] = endpoint.BindingAddress.Host;
@@ -405,27 +407,28 @@ private static IResourceBuilder<ProjectResource> WithProjectDefaults(this IResou
                 Dictionary<string, int> endpointCountByScheme = [];
                 foreach (var url in urlsFromApplicationUrl)
                 {
-                    var uri = new Uri(url);
+                    var bindingAddress = BindingAddress.Parse(url);
 
                     // Keep track of how many endpoints we have for each scheme
-                    endpointCountByScheme.TryGetValue(uri.Scheme, out var count);
-                    endpointCountByScheme[uri.Scheme] = count + 1;
+                    endpointCountByScheme.TryGetValue(bindingAddress.Scheme, out var count);
+                    endpointCountByScheme[bindingAddress.Scheme] = count + 1;
 
                     // If we have multiple for the same scheme, we differentiate them by appending a number.
                     // We only do this starting with the second endpoint, so that the first stays just http/https.
                     // This allows us to keep the same behavior as "dotnet run".
                     // Also, note that we only do this in Run mode, as in Publish mode those extra endpoints
                     // with generic names would not be easily usable.
-                    var endpointName = uri.Scheme;
-                    if (endpointCountByScheme[uri.Scheme] > 1)
+                    var endpointName = bindingAddress.Scheme;
+                    if (endpointCountByScheme[bindingAddress.Scheme] > 1)
                     {
-                        endpointName += endpointCountByScheme[uri.Scheme];
+                        endpointName += endpointCountByScheme[bindingAddress.Scheme];
                     }
 
                     builder.WithEndpoint(endpointName, e =>
                     {
-                        e.Port = uri.Port;
-                        e.UriScheme = uri.Scheme;
+                        e.Port = bindingAddress.Port;
+                        e.TargetHost = bindingAddress.Host;
+                        e.UriScheme = bindingAddress.Scheme;
                         e.FromLaunchProfile = true;
                         adjustTransport(e);
                     },
@@ -640,7 +643,10 @@ private static void SetAspNetCoreUrls(this IResourceBuilder<ProjectResource> bui
                     processedHttpsPort = true;
                 }
 
-                aspnetCoreUrls.Append($"{e.Property(EndpointProperty.Scheme)}://localhost:{e.Property(EndpointProperty.TargetPort)}");
+                // If the endpoint is proxied, we will use localhost as the target host since DCP will be forwarding the traffic
+                var targetHost = e.EndpointAnnotation.IsProxied ? "localhost" : e.EndpointAnnotation.TargetHost;
+
+                aspnetCoreUrls.Append($"{e.Property(EndpointProperty.Scheme)}://{targetHost}:{e.Property(EndpointProperty.TargetPort)}");
                 first = false;
             }
 

src/Aspire.Hosting/PublicAPI.Unshipped.txt

@@ -30,6 +30,8 @@ Aspire.Hosting.ApplicationModel.ConnectionStringReference.ConnectionName.get ->
 Aspire.Hosting.ApplicationModel.ConnectionStringReference.ConnectionName.set -> void
 Aspire.Hosting.ApplicationModel.CustomResourceSnapshot.HealthStatus.get -> Microsoft.Extensions.Diagnostics.HealthChecks.HealthStatus?
 Aspire.Hosting.ApplicationModel.CustomResourceSnapshot.HealthStatus.init -> void
+Aspire.Hosting.ApplicationModel.EndpointAnnotation.TargetHost.get -> string!
+Aspire.Hosting.ApplicationModel.EndpointAnnotation.TargetHost.set -> void
 Aspire.Hosting.ApplicationModel.CustomResourceSnapshot.Volumes.get -> System.Collections.Immutable.ImmutableArray<Aspire.Hosting.ApplicationModel.VolumeSnapshot!>
 Aspire.Hosting.ApplicationModel.CustomResourceSnapshot.Volumes.init -> void
 Aspire.Hosting.ApplicationModel.HealthCheckAnnotation

tests/Aspire.Hosting.Tests/ProjectResourceTests.cs

@@ -590,6 +590,52 @@ public async Task AddProjectWithArgs()
             arg => Assert.Equal("http://localhost:1234", arg));
     }
 
+    [Theory]
+    [InlineData(true, "localhost")]
+    [InlineData(false, "*")]
+    public async Task AddProjectWithWildcardUrlInLaunchSettings(bool isProxied, string expectedHost)
+    {
+        var appBuilder = CreateBuilder(operation: DistributedApplicationOperation.Run);
+
+        appBuilder.AddProject<TestProjectWithWildcardUrlInLaunchSettings>("projectName")
+            .WithEndpoint("http", e =>
+            {
+                Assert.Equal("*", e.TargetHost);
+                e.AllocatedEndpoint = new(e, "localhost", e.Port!.Value, targetPortExpression: "p0");
+                e.IsProxied = isProxied;
+            })
+            .WithEndpoint("https", e =>
+            {
+                Assert.Equal("*", e.TargetHost);
+                e.AllocatedEndpoint = new(e, "localhost", e.Port!.Value, targetPortExpression: "p1");
+                e.IsProxied = isProxied;
+            });
+
+        using var app = appBuilder.Build();
+
+        var appModel = app.Services.GetRequiredService<DistributedApplicationModel>();
+        var projectResources = appModel.GetProjectResources();
+
+        var resource = Assert.Single(projectResources);
+
+        var config = await EnvironmentVariableEvaluator.GetEnvironmentVariablesAsync(resource, DistributedApplicationOperation.Run, TestServiceProvider.Instance);
+
+        var http = resource.GetEndpoint("http");
+        var https = resource.GetEndpoint("https");
+
+        if (isProxied)
+        {
+            // When the end point is proxied, the host should be localhost and the port should match the targetPortExpression
+            Assert.Equal($"http://{expectedHost}:p0;https://{expectedHost}:p1", config["ASPNETCORE_URLS"]);
+        }
+        else
+        {
+            Assert.Equal($"http://{expectedHost}:{http.TargetPort};https://{expectedHost}:{https.TargetPort}", config["ASPNETCORE_URLS"]);
+        }
+
+        Assert.Equal(https.Port.ToString(), config["ASPNETCORE_HTTPS_PORT"]);
+    }
+
     internal static IDistributedApplicationBuilder CreateBuilder(string[]? args = null, DistributedApplicationOperation operation = DistributedApplicationOperation.Publish)
     {
         var resolvedArgs = new List<string>();
@@ -633,7 +679,7 @@ public TestProjectWithLaunchSettings()
         {
             Profiles = new()
             {
-                ["http"] = new ()
+                ["http"] = new()
                 {
                     CommandName = "Project",
                     CommandLineArgs = "arg1 arg2",
@@ -668,4 +714,25 @@ public TestProjectWithManyAppUrlsInLaunchSettings()
             };
         }
     }
+
+    private sealed class TestProjectWithWildcardUrlInLaunchSettings : BaseProjectWithProfileAndConfig
+    {
+        public TestProjectWithWildcardUrlInLaunchSettings()
+        {
+            Profiles = new()
+            {
+                ["https"] = new()
+                {
+                    CommandName = "Project",
+                    CommandLineArgs = "arg1 arg2",
+                    LaunchBrowser = true,
+                    ApplicationUrl = "http://*:5031;https://*:5033",
+                    EnvironmentVariables = new()
+                    {
+                        ["ASPNETCORE_ENVIRONMENT"] = "Development"
+                    }
+                }
+            };
+        }
+    }
 }